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 1 
 on: April 19, 2019, 10:39:15 AM 
Started by Martin X. Moleski, SJ - Last post by Sean Kerry-Williams
A quick update to my last post.  It turns out that the pilot of Sala's plane may not have been instrument -rated, or even night -rated.  Apparently he held a PPL, and there has been considerable discussion on other forums as to whether this flight was an example of illegal public transport. 

 2 
 on: April 11, 2019, 03:56:41 PM 
Started by Greg Daspit - Last post by Greg Daspit
Here are two experiments proposed to further test the Bevington Photo:

1.   The full size mock-up experiment. It would just include the worm gear and the fork with wheel hub without tire.  The goal is to test the angles and size of the hard parts by doing an overlay using a real photo of the mock up to compare with the Bevington photo. The photos would be taken from the same distance so the perspective is the same. The material used in the mock-up will be better if it was lighter. This is because you will need to adjust and support them in different positions. This could take multiple attempts. If the mock-up is heavy like the real thing, then support structures become a bigger issue. I’m thinking a lightweight box frame with fishing line to support the fork below it. The worm gear can have a simple brace mounted to the unseen side. ¾” plywood painted a reflective color can be used for the worm gear. PVC pipe may work for the fork.  I don't think it is realistic to do a shadow test with tire and fender full size. This is why the virtual AuoCAD experiment was done.

2.   The small scale mock-up experiment. Goal is to test shadows of the tire and fender by using a small amount of clay that can be deformed.  It can be worked on inside with artificial light source so becomes realistic.  Something like clay or Super Sculpey can be used to work on the fender and tire. Polystyrene pipe shapes and sheet from a hobby or model railroad shop can be used for the hard parts. Once done, a real photo could be taken from a scaled distance and an overlay test done. Not sure how scaled distance affects the perspective?

The tire would not be something that needs to be 3D printed in any of the two experiments since its shape would have to be estimated by trial and error in a material that can be deformed. The Autocad experiment shows the tire had to be deformed.
I’m willing to work on the small scale model experiment and even build it from scratch.   I can assist with dimensioned drawings if someone want to take on either building a full size mock up or a small scale mock up.

 3 
 on: April 11, 2019, 03:47:52 PM 
Started by Greg Daspit - Last post by Greg Daspit
Good Evening Guys!!! I was reading Greg's post just now and remembered something that was presented several years ago on the forum. Is it possible Ric, that the Bevington photo of the landing gear became part of the G feature you guys found? Also, I saw the new photo layout for Tighar...nicely done. With that said...if the rocks laying on the beach like your picture shows...and Amelia did land...what scenario would we have if she was to dodge a whole set of rocks coming right at her? She would have braked super hard and would have had to go left or right...and thus causing a chain of events to happen! Something to think about!           

https://tighar.org/wiki/G_feature
"G” shaped is just my description of the estimated tires shape. My estimation is it is similar to the shape of the tire after the Luke field accident based on where the shadows fall, and could not fall if fully inflated. The "G feature" is just off the lagoon on the other side of the island and not near the reef where the Bevington photo is.  Interesting how close the "G feature" is to the Bushnell survey points.

 4 
 on: April 10, 2019, 10:40:34 PM 
Started by Greg Daspit - Last post by Randy Conrad
Good Evening Guys!!! I was reading Greg's post just now and remembered something that was presented several years ago on the forum. Is it possible Ric, that the Bevington photo of the landing gear became part of the G feature you guys found? Also, I saw the new photo layout for Tighar...nicely done. With that said...if the rocks laying on the beach like your picture shows...and Amelia did land...what scenario would we have if she was to dodge a whole set of rocks coming right at her? She would have braked super hard and would have had to go left or right...and thus causing a chain of events to happen! Something to think about!           

https://tighar.org/wiki/G_feature

 5 
 on: April 07, 2019, 07:01:06 PM 
Started by Greg Daspit - Last post by Greg Daspit
What are the approximate diameters of the wheel and tire?

Thanks,

Jon
The undeformed tire diameter is 35".  The wheel hub is 6".
The tire in the Bevington photo is sort of "G" shaped instead of "O" shaped so it does not have a consistent diameter.

 6 
 on: April 07, 2019, 09:23:33 AM 
Started by Greg Daspit - Last post by Jon Romig
What are the approximate diameters of the wheel and tire?

Thanks,

Jon

 7 
 on: April 06, 2019, 01:48:20 PM 
Started by Greg Daspit - Last post by Walter Runck
In one Bonus Feature film clip from from the show "Ice Pilots NWT" (Buffalo Airways), they recovered the landing gear from an old crash site of an Electra they once flew. Years previously it flipped-over when landing on a dry lake bed and burned with no fatalities. So, Buffalo Airways has one with the big toothed gear somewhere among their stuff.

That's what I was trying to remember.  I emailed the company about 5-6 years ago and never got a response.

Not that trying to drag a set out of the Idaho crash site looked too challenging, but maybe UPS Heavy would be a little more straightforward.

 8 
 on: April 06, 2019, 08:03:33 AM 
Started by Greg Daspit - Last post by James Champion
In one Bonus Feature film clip from from the show "Ice Pilots NWT" (Buffalo Airways), they recovered the landing gear from an old crash site of an Electra they once flew. Years previously it flipped-over when landing on a dry lake bed and burned with no fatalities. So, Buffalo Airways has one with the big toothed gear somewhere among their stuff.

 9 
 on: April 05, 2019, 08:13:53 PM 
Started by Greg Daspit - Last post by Jon Romig
The BUILD Space studio has huge windows to the promenade and I have seen lots of fascinating projects fabricated there. I also notice that it is fairly underutilized and they appear to like projects that capture the imagination of passers-by.

I can reach out to them if you think it is worthwhile.

Jon
Jon, I should have addressed my previous post to you since you might have access to 3D printers.

Do you know what would be needed to get a 3D printed model?

I will talk to the folks at the Build Space on Monday.

Jon

 10 
 on: April 04, 2019, 09:47:20 AM 
Started by Greg Daspit - Last post by Ric Gillespie
3.  Find a set of gear for sale or loan.  There was some lying around up in Alaska a few years ago as I recall.

Recovering anything from the Alaska wreck would be virtually impossible. Attached are photos from the wreck in Idaho.  You wouldn't believe how heavy this stuff is. Gotta be over a hundred pounds.   Recovering these pieces from the ravine would take a Jeep with a winch and about a quarter mile of cable. Then you'd have to figure out how to get them home. 

Nice work on the shadowing study.  It is hard to follow how the components end up in the modeled positions from their as-built arrangement i.e. what bent or broke to hold them where they appear in the assumed position?  Is there a thread I missed that explains the thinking?

In the Idaho crash, on one side, the oleo piston on the fork pulled out of the strut.  On the other gear, the assembly stayed together.
In the Luke Field crash, the shaft of the oleo piston broke. The worm gear on the upper strut twisted around and cut open the tire.
That appears similar to the disassembly implied by the Bevington Photo.
 

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